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Reports of side effects caused by the vaccine, which has so far been shown to be safe, come days after Pfizer and its German partner BioNTech announced that the vaccine was 90% effective in preventing coronavirus, and it is expected that the Pharmaceutical companies apply for US emergency use authorization month.
During the trials, the more than 43,500 volunteers from six countries were not informed whether they received the vaccine or a placebo.
However, some volunteers reportedly said they were able to tell they had received the vaccine due to certain side effects, such as headaches and muscle aches.
According to Glenn Deshields, 44, of Austin, Texas, who spoke to the Press Association, its side effects were similar to a “severe hangover” but quickly disappeared.
An antibody test by Deshields later revealed that he had developed antibodies to the virus, which convinced him that he had received the actual vaccine.
Another volunteer, a 45-year-old Missouri woman identified as Carrie, said she experienced a fever, headache, and body aches after receiving her first injection, which she compared to a flu shot, with side effects similar to those of the flu. supposedly worse after getting her second injection.
In a statement Monday on the efficacy of the vaccine, Dr. Albert Bourla, Pfizer’s president and CEO, said: “Today is a great day for science and humanity. The first set of results from our Phase 3 Covid-19 vaccine trial provides initial evidence of our vaccine’s ability to prevent Covid-19.
“We are reaching this critical milestone in our vaccine development program at a time when the world needs it most, with infection rates setting new records, hospitals approaching overcapacity and economies struggling to reopen. With today’s news, we are a significant step closer to giving people around the world a much-needed breakthrough in helping to end this global health crisis. We look forward to sharing additional efficacy and safety data generated by thousands of participants in the coming weeks. “
As of now, questions remain about the vaccine’s efficacy based on age and ethnicity, and how long immunity can last, Reuters reports.
